National Museum of Nuclear Science & History
E. C. McAdoo worked for the Roane-Anderson Company.
James Barton worked as a carpenter for the DuPont Company at the Hanford, Washington site. He never knew he was working on the atomic bomb until after it was dropped in Japan.
Bryce worked at Los Alamos during the Manhattan Project.
Robert Coveyou was a mathematician and health physicist that worked at both the Met Lab in Chicago and at the X-10 graphite reactor in Oak Ridge, Tennessee.